Apparatus for administering nitrous-oxide gas



(No Model.)

2 Sheets-Sheet 1.

y G. H. HURD. Apparatus for Administering Nitrous Oxide Gais. No. 234,672.

Patented Nov. 23, 1880.-

WITNESSES Miew wfg.

ATTORNEY N.-PE\ERS, FHOm-LITHOGRAPMER, WASHINGTON. 0 C.

(No Model.) 2 Sheets-Sheet. 2.

K G. H. HUR'D. Apparatus for Administering Nitrous Oxide Gais.

No. 234,672. Patented Nov. 23,1880.

wir

WITNESSES ATTORNEY Unitime States Bernat Citrine.

GEORGE H. HURD, OF CLEVELAND, OHIO.

APPARATUS FOR ADMINISTERING NITROUS-OXIDE GAS.

SPECIFICATION forming part of Letters Patent No. 284,672, dated November 23, 1880.

Application filed March 29, 1880.

To all whom it may concern:

Be it known that I, GEORGE H. HURD, ot' Cleveland, in the county ot' Cuyahoga and Stateot Ohio, have invented certain new and useful Improvements in Apparatus for Administering Nitrous Oxide Gas; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it pertains to make and use it, reference being had to the accompanying drawings, which form part of this specification.

In the drawings, Figure l is a vertical sectional view of my device. Fig. 2 is a plan View ot the stand adapted for supporting the gasometer. Fig. 3 is a plan view ot' the top of the gasoineter. Fig. 4L is a sectional View ot' the valve and mechanism attached to the float used in` supporting the gas-container. Fig. 5 is a sectional view of my device for attachin g the can in which nitrous-oxide gas is received to the gasometer from which it is administeied. Fig. 6 is a'plan view ot a section of the metal tube through which connection is made between the gas-can and the gasometer.

In the said drawings, A represents the base, adapted to support the can from which nitrous oxide is supplied, and also the gasometer from which it is taken to be administered. This is made preferably ot' metal and recessed in the bottom, so as to permit the pipe leading from the gas-chamber to the inhaler to pass through the bottom of the gas chamber, and from thence through one side of the support.

B represents the cans or containers in which nitrous-oxide gas is usually supplied by dealers to the trade.

Crepresents the outer casingof my improved gasometer. This I prefer to make of Russia iron, uniting' the same, where necessary, by double seams, thereby dispensing with the use of solder. I find this material preferable to any other with which I am acquainted. When brass is used for this purposea certain amount ot' verdigris is occasioned, and when other metals are used, as tin or zinc, and held together by means of solder, the action ot' the nitrous oxide upon it occasions a certain amount of lead poison, so that both constructions are objectionable. I have found it pref- (No model.)

erable, as before stated, to construct gasometers for the use of nitrous-oxide gas of Russia iron and unite the same by what tinners call a double seam,77 then subjecting them to a coat ot' japan or other non-corrodible material. Near the top of my outer casing I insert screws c, three or more, as shown in Fig. 3 ot' the drawings, and these I insert from the inside. The function ot' these screws is to present a bearing to the inner gas-container and also Y of rubber or other elastic material which is used in locking the gas-container at any desired point by inserting it between the gas-ly container and the outer casing, C, as shown in Fig. l.

F represents a tube calculated at the proper time to fill with water and act as a weight. This may be made ot' any suitable material, but I prefer to construct it otA the same material and in substantially the same manner as that described for the outer casing ot' my gasometer. rIhis tube is attached to the lio-at E by means otl a screw, substantially as shown. It is provided at its lower terminus with openings for the ready admission or emission of water. It also has a valve-seat, F, preferably consisting of a section ot' rubber pipe of suitable size. It is also provided with a valve, f." After the inner container of iny gasometer is filled with gas the float E is near the top of the outer casing, C. As the gas is taken from the gasometer through the inhaler the inner gas-container gradually sinks and becomes filled with water. Pressure upon the gas passing through the inhaler decreases as the container fills with water, and I have found it necessary to provide an additional weight for driving it down at the proper time. The device F is calculated for this purpose. As the container sinks the valve f is driven against its seat F', preventing the water from entering the tube F until it has sunk to a depth in the IOO water equal to the length of the tube F, when the saine fills with water over its top, thereby adding weight to the container, giving additional pressure to the gas.

G is a ieXible tube connecting the gas-chamber with the inhaler. In my device I introduce this into the gas-chamber, and, in fact, into the gasometer through the bottom, in the manner substantially as shown. This tlexible tube is supplied with a lioat, G. This consists of a wooden tube adapted to incase the pipe G and to readily move thereon. The object of this ioat is to keep the pipe Gin a perpendicular position.

It is very desirable in devices of this character to have all the joints perfectly tight;

otherwise there is a large wastage ot' gas.

In my gasomcter I supply the gaschamber by connecting the iiexible pipe G at any con venient point outside ot the gasometer with the gas'can B. The mode of connection is shown in crosssection in Fig. 5. I insert in the iexible pipe G, at the desired point, a metal tube, g. To this I attach, by means of a screwthread, the short pipe g. By screwing this up tightly the sides of the iiexible pipe G serve asa packing for the joint. This small tube g is provided with a cap, g2, which is adapted to turn about the pipe g. This cap upon its inner face is provided with a screwthread, whereby it is adapted to engage with a pipe leading from the gas-can B. This is made tight by the use of suitable packing.

The operation of my device is as follows: The gas-can B is placed in position, as shown, the outer casing ot' the gasometer C is filled with water, the gas-container D is inverted and sunk in the water in the container' G. Connection is now made between the gas-can B and the elastic tube G, the valve B opened, when the gas will pass into the tube G, and from thence to a point near the top of the gascontainer D, where it is discharged. This gas, in turn, will displace the water and cause the gascontainer D to rise, which it will continue to do until sufficiently iilled for the purposes required, when the valve B is closed. The inhaler is then placed over the mouth of lthe patient, and as the gas is inhaled the container D gradually sinks in the casing C. The water, as it rises in the container, drives the valve f in the tube I against its seat F', preventing thereby thewater from flowing into the tube. This pressure continues until the gascontainer D has sunk in the water, and until the tube F is submerged, when it will fill from its open top with water, thereby adding weight and assisting by its weight in forcing the gas from the container through the inhaler.

What I claim is- 1. The combination, with a ioat, E, ot' the inner gas-container ot' a gasoineter, of the pipe F, substantially as and for the purpose shown.

2. The combination, with a iioat, E, ot' the pipe F, having the valve-seat F', and valve f, substantially as and for the purpose shown.

3. In a gasometer adapted for use in the administration of nitrous-oxide gas, the combination, with a tube communicating with the gas-container and provided at its outer extremity with an inhaler, of a second tube having one extremity connected with said firstmentioned tube and its opposite extremity adapted to be connected to a gas-can, substantially as set forth.

4. In a gasometer, the combination, with a gas-container and a casing, ot' an annular series of set-screws having thread engagement with the casing and adapted to have their heads bear against the sides of the container, substantially as set forth.

5. In a gasometer, the combination, with a gas-container, of a rigid sleeve extending upward therein, and a flexible tube supported within said sleeve and project-ing out ot' its upper extremity, substantially as set forth.

6. In a gasometer, the combination, with iiexible pipe G, provided with interior rigid tube g, of pipe g and cap g2, adapted to oonnect the latter with a gas-can, substantially as set forth. l

7. The combination, with supply-pipe G, of metal tube g, fitted in the latter, and pipey, which connects with said tube, substantially as and for the purpose described.

In testimony whereofI have signed my name to this specitication in the presence ot' two subscribing witnesses.

GEORGE H. HURD.

fitnessesz JN0. CROWELL, J r., W. E. DONNELLY. 

